Locomotive



LOCOMOTIVE Filed Oct. 15. 1926 Hel fl WIRTH,

\NVENT m WK Patented July 5, 1927.

UNlTED' STATES PATENT OFFICE.

HEINRICH WIRTH, OF MUNICH, GERMANY, ASSIGNOR TO THE FIRM J. .A. MAFFEI,OF MUNICH, GERMANY.

LOCOMOTIVE.

Application filed October 15, 1926, Serial No. 141,704, and in GermanyApril 9, 1926.

The invention relates to locomotives of the kind having two separatelydriven bogies, as in the Well known brarrat, Fairly, Meyer and Mallettypes.

The object of the invention is to effect certain improvements in regardto the position of the centre of gravity, the distribution of the weightof the frame (making the same generally uniform but variable withincertain limits), rigidity of the connection between the coal bunker andboiler, space available for a long boiler, and support of the main frameby the bogies without the pivots.

According to the invention the boiler, cab and a coal bunker behind thecab are carried by a main frame resting in front on the frame of abogey, which also supports a container for part of the water. Anotherpart of the water is stored below the boiler, or at both sides of thesame or of the main frame. Another supply of water may be carried behindthe coal bunker, or at both sides thereof. The water containers may beconnected with each other to allow of transfer of their contents asrequired. By making the forward water container comparatively small,increased space is obtained so that an economically working boiler withlong fire-tubes can be obtained. The main frame extends rearwards belowthe containers and rests on the rear bogey, which does not directlycarry any water or coal supply. The pivots have no part in supportingthe weight of the main frame, and can be placed wherever most suitablefor the curves to be negotiated. The fixed connection of a coal bunkerwith the rear of the boiler renders the arrangement of an automaticstoker much easier than is the case where a loose tender is used. Thecentre of gravity is low, and the regulatable distribution of the watersupply reduces the tendency of the bogies to rock. The pivots being freefrom load, they do not impose any restriction on theweight which can beplaced on the bogies without impairing flexibility. The invention thusenables very heavy and economical high-speed locomotives to be used ontracks with difficult gradients andcurves.

A locomotive designed according to the annexed drawings, in which Fig. 1is a side view and Fig. 2 a plan view.

There are three main parts. The boiler, a cab 1), lower tank 0 andbunker d, with an additional rear tank 6 if required, form a rigidstructure with the main frame 7. The latter is connected bya pivot gwith the forward bogey it, but rests thereon by means of bearing pins2'. The forward bogey carries a tank 74. The frame f is connected to therear bogey h by means of a pivot g and bearing pins i Z, Z are thecylinders.

Instead of the pivot g and pins 2', or of the pivot g and pins 7?, aball joint may be used, serving both as support and as pivot. The pivotpins 2', or 2' may be elastically supported, to prevent a twistingstrain'where one rail level is higher than the other.

Having now particularly described and as certained the nature of myinvention and in what manner the same is to be performed, I declare thatwhat I claim is: I

1. A locomotive having two independently driven bogies, one supportingthe main frame only and the other supporting the main frame and astorage container, 'the main frame, which carries the boiler and cab,having a rearward extension with a bunker or a bunker and tank thereon,and the forward bogey carrying a tank.

2. A locomotive as claimed in claim 1, with a tank on the mainframebetween the same.

3. A locomotive as claimed in claim 1, wherein separate pivotal andweight carrying connections are provided between the main frame and eachor either of the bogies. In testimony whereof I hereunto afiix mysignature.

HEINRICH WIRTH.

invention is shown diagrammatically in the v

